I read them all once and then put them on the bookshelf. I don't think there are any noticeable stains, but please refrain from purchasing if you are nervous, as they have been stored by a private individual. I will also include the storage boxes that came with the purchase of volumes 1-10 and 11-20. Volumes 21-29 and Episode Nagi have transparent covers on them. Instant purchase is OK ️⭕️ No price reduction or individual sales ❌